public function testReduceRight()
{
// from js
$list = __u::reduceRight(array('foo', 'bar', 'baz'), function ($memo, $str) {
return $memo . $str;
}, '');
$this->assertEquals('bazbarfoo', $list, 'can perform right folds');
$ifnull = null;
try {
__u::reduceRight(null, function () {
});
} catch (Exception $e) {
$ifnull = $e;
}
$this->assertFalse($ifnull === null, 'handles a null (without initial value) properly');
$this->assertEquals(138, __u::reduceRight(null, function () {
}, 138), 'handles a null (with initial value) properly');
// extra
$list = __u(array('moe', 'curly', 'larry'))->reduceRight(function ($memo, $str) {
return $memo . $str;
}, '');
$this->assertEquals('larrycurlymoe', $list, 'can perform right folds in OO-style');
$list = __u::foldr(array('foo', 'bar', 'baz'), function ($memo, $str) {
return $memo . $str;
}, '');
$this->assertEquals('bazbarfoo', $list, 'aliased as "foldr"');
$list = __u::foldr(array('foo', 'bar', 'baz'), function ($memo, $str) {
return $memo . $str;
});
$this->assertEquals('bazbarfoo', $list, 'default initial value');
// docs
$list = array(array(0, 1), array(2, 3), array(4, 5));
$flat = __u::reduceRight($list, function ($a, $b) {
return array_merge($a, $b);
}, array());
$this->assertEquals(array(4, 5, 2, 3, 0, 1), $flat);
}